Carrier bringing note up (3)
I believe the answer is:
hod
'carrier' is the definition.
(I've seen this before)
'note up' is the wordplay.
'note' becomes 'doh' (alternative spelling of 'do' as in do re mi).
'up' is a reversal indicator (in down clue: letters go upwards).
'doh' written backwards gives 'HOD'.
'bringing' is the link.
(Other definitions for hod that I've seen before include "Carrier for bricks" , "Trough on pole for carrying bricks" , "V-shaped box on a pole for bricks" , "Trough on pole used by bricklayer to carry things" , "Carrier for a bricklayer" .)